CN110165969B - Control device for machine tool - Google Patents
Control device for machine tool Download PDFInfo
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- CN110165969B CN110165969B CN201910110243.3A CN201910110243A CN110165969B CN 110165969 B CN110165969 B CN 110165969B CN 201910110243 A CN201910110243 A CN 201910110243A CN 110165969 B CN110165969 B CN 110165969B
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- abnormality
- machine tool
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- control device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/025—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a power interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24053—Diagnostic of controlled machine
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/42—Servomotor, servo controller kind till VSS
- G05B2219/42314—Warning signals are send when excess in error for speed, acceleration, amplitude
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Numerical Control (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a control device for a machine tool, which can easily determine the cause of a warning. A control device (100) for a machine tool is provided with a power supply monitoring unit (170), a power supply abnormality detection unit (180), and an abnormality diagnosis unit (195). A power supply monitoring unit (170) acquires respective quantities indicating the operating states of a machine tool and/or peripheral devices of the machine tool, such as an AC power supply (120) or a motor (160). A power supply abnormality detection unit (180) detects an abnormality in the operating state of the machine tool and/or peripheral equipment, and outputs a signal indicating the abnormality and respective quantities at the time of detection of the abnormality. An abnormality diagnosis unit (195) automatically selects each of the quantities relating to an abnormality and automatically diagnoses the cause of the abnormality.
Description
Technical Field
The present invention relates to a control device for a machine tool.
Background
Conventionally, a control device that outputs a warning when an obstacle occurs in the operation of a machine tool is known. When an abnormality occurs in a power supply or a motor drive device used for a machine tool, a control device outputs a warning and stores data at the time of occurrence of the abnormality. An operator of the machine tool determines whether the abnormality is on the power supply side or the motor drive device side based on the stored data (patent document 1).
As a configuration for specifying a more detailed cause of an abnormality, a machine tool provided with an abnormality diagnostic device is known (patent documents 2 and 3). In the structure of patent document 2, an abnormality diagnosis device is provided independently of the machine tool. The abnormality diagnosis device analyzes the symptoms of the abnormality input by the operator and estimates the cause of the abnormality. In the structure of patent document 3, a machine tool that displays details of the cause of an abnormality is proposed.
Patent document 1: japanese patent application laid-open publication No. 2011-205740
Patent document 2: japanese laid-open patent publication No. H03-088034
Patent document 3: japanese laid-open patent publication No. 60-179899
Disclosure of Invention
Problems to be solved by the invention
However, in the configuration of patent document 1, it is known that the cause of the abnormality is on either the power supply side or the motor drive device side, but in order to identify the cause of the abnormality, it is necessary for an operator to check each position. For example, when an abnormality occurs in a peripheral device of a machine tool, an abnormal value is selected from stored data, and an operator himself or herself examines a position that becomes a cause of the abnormal value. Therefore, there is a problem that the operator needs much time to determine the cause of the warning.
In the configuration of patent document 2, the cause of an abnormality is analyzed by the abnormality diagnostic device, but the operator takes time and effort to input an abnormal symptom to the abnormality diagnostic device. The configuration of patent document 3 displays details of an abnormality, but does not have a function of automatically analyzing the cause of the abnormality.
The invention aims to provide a control device of a machine tool, which can easily determine the reason of warning.
Means for solving the problems
(1) A control device for a machine tool (for example, a control device 100 described later) according to the present invention includes: a sensor (for example, a power supply monitoring unit 170 described later) that acquires respective quantities indicating operating states of a machine tool and/or peripheral devices (for example, an ac power supply 120 or a motor 160 described later) of the machine tool; an abnormality detection unit (for example, a power abnormality detection unit 180 described later) that detects an abnormality in the operating state of the machine tool and/or the peripheral device, and outputs a signal indicating the abnormality and the respective quantities at the time of detection of the abnormality; an abnormality diagnosing unit (for example, an abnormality diagnosing unit 195 described later) automatically selects each of the quantities related to the abnormality and automatically diagnoses the cause of the abnormality.
(2) The control device for a machine tool according to (1) may further include a control unit (e.g., a control unit 190 described later), a display unit (e.g., a display unit 300 described later), and a storage unit (e.g., a storage unit 197 described later), and the name of the abnormality, the cause of the abnormality, and the respective quantities related to the abnormality may be displayed on a display screen of the display unit. The name of the abnormality, the cause of the abnormality, and the respective quantities relating to the abnormality may be stored in the storage unit.
(3) In the control device for a machine tool according to (2), the abnormality detection unit may output a signal indicating absence of the abnormality to the control unit when it is determined that the cause of the abnormality is eliminated and normal operation is enabled, and the control unit may resume the display screen to a normal operation screen, resume operation of the machine tool and/or peripheral devices of the machine tool, and make it possible to refer to the occurrence of the abnormality from the storage unit as a history and display the history on the display screen.
(4) In the control device for a machine tool according to (2), the abnormality detection unit may output a signal indicating absence of the abnormality to the control unit when it is determined that the cause of the abnormality is eliminated and the control unit may return to normal, and the control unit may display a history indicating occurrence of the abnormality on the display screen.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a control device for a machine tool, which can easily identify the cause of a warning.
Drawings
Fig. 1 is a functional block diagram of a control device according to an embodiment of the present invention.
Fig. 2 is a flowchart showing a sequence for specifying the cause of an abnormality according to an embodiment of the present invention.
Fig. 3 is a diagram showing a display screen of a display unit according to an embodiment of the present invention.
Description of the reference numerals
100: a control device; 120: an ac power supply (peripheral); 160: motors (peripherals); 170: a power supply monitoring unit (sensor); 180: a power supply abnormality detection unit (detection unit); 190: a control unit; 195: an abnormality diagnosis unit; 197: a storage unit; 300: a display unit.
Detailed Description
An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a functional block diagram of the control device 100. The rectifier 130 converts ac power from the ac power supply 120 into dc power. Inverter 140 converts the dc power from rectifier 130 into ac power and supplies the ac power to motor 160. A smoothing capacitor 150 for removing noise is provided between the rectifier 130 and the inverter 140.
The power supply monitoring unit 170 detects the voltage, current, frequency, and voltage of the smoothing capacitor 150, which are the respective quantities input to the rectifier 130. The detected respective amounts are transmitted to the power supply abnormality detection unit 180 and the control unit 190. A memory (not shown) provided in the control unit 190 always records each amount transmitted from the power supply monitoring unit 170. The storage unit 197 provided in the control unit 190 includes, for example, a nonvolatile memory, and stores the abnormal state detected by the power supply abnormality detection unit 180 and the respective amounts when abnormality is detected. The control unit 190 includes an abnormality diagnosis unit 195 for diagnosing an abnormality as described in detail below and a display unit 300.
Fig. 2 is a flowchart showing a sequence for specifying the cause of an abnormality according to an embodiment of the present invention. The processing shown in fig. 2 is performed by the power supply abnormality detection unit 180 and the control unit 190. In the processing in steps S210 to S246, whether or not there is an abnormality in the operation of the machine tool is determined based on each quantity, and whether or not to switch the display screen is determined based on the result of the determination.
In step S210, the respective quantities detected by the power supply monitoring unit 170 (see fig. 1) are acquired. The respective quantities are information such as the voltage, current, frequency of the ac power supply 120 (see fig. 1), the voltage of the smoothing capacitor 150, and the voltage and/or current of the peripheral devices of the machine tool including the speed and acceleration of the motor 160.
When the respective amounts are acquired, it is determined in step S214 whether or not the respective amounts are within the normal range. The normal range is a numerical range used by the control device 100 (see fig. 1) for normal operation. When each amount is within the normal range, it is determined in step S218 that there is no abnormality.
If it is determined in step S214 that the respective amounts are not within the normal ranges, the process proceeds to step S222. In step S222, when it is determined that there is an abnormality, the power supply abnormality detection unit 180 (see fig. 1) transmits a signal indicating the abnormality to the abnormality diagnosis unit 195 (see fig. 1).
When receiving the signal indicating the abnormality, the abnormality diagnostic unit 195 executes the iterative processing for specifying the cause of the abnormality in step S226. In the abnormality cause determination loop (loop), it is determined whether each of m kinds (m is a positive integer) of quantities satisfies the abnormality cause, that is, whether each quantity is within a normal range. The value of m is determined according to the number of types of the respective quantities detected by the power supply monitoring unit 170.
When it is determined that the abnormality cause is satisfied, the abnormality cause is transmitted to the control unit 190 (see fig. 1) in step S234. When the cause of the abnormality is transmitted to the control unit 190, the control unit 190 shifts the display screen to a warning screen as shown in fig. 3 in step S246.
When the processing of the abnormality cause determination loop in step S226 ends, it is determined in step S238 whether or not the abnormality cause is transmitted to the control section 190. If it is determined in step S238 that the cause of the abnormality has not been transmitted, the process proceeds to step S242.
In step S242, a signal indicating that the cause of the abnormality is not specified is transmitted to the control unit 190 (see fig. 1). In step S246, the control section 190 shifts the display screen of the display section 300 to the warning screen, and displays that the cause of the abnormality cannot be determined.
Fig. 3 is a diagram showing a display screen of the display unit 300. The display unit 300 includes a warning area 310, a numerical value display area 320, and a graph display area 330.
The name of the abnormality, the estimated cause of the abnormality, and guidance (guidance) are displayed in the warning area 310. Regarding the names of the anomalies, for example, "X-axis: abnormal phenomena such as PS input power supply abnormality. The estimated causes of the abnormality are a plurality of causes of the abnormality estimated by the abnormality diagnosis unit 195 (see fig. 1), for example, estimated causes of the abnormality such as "1. PS, SV, or SP failure", "2. input power supply abnormality", and "3. MCC, or cable failure". The guidance is, for example, a message to prompt a more specific countermeasure such as "no power supply" and "power cable, voltage detection cable, or input power failure".
The numerical value display area 320 displays the respective quantities at the time of occurrence of an abnormality. As described above, the respective quantities are, for example, the voltage, current, and frequency of the power supply 120 (see fig. 1). Further, a graph visualized based on each amount displayed in the numerical value display area 320 is displayed in the graph display area 330. The operator can compare the chart with the estimated cause to determine the location of the abnormality. The operator can also follow the change of each amount by referring to the history of each amount recorded in the memory (not shown) of the control unit 190 (see fig. 1).
When the operator removes the cause of the abnormality based on the guidance of the display unit 300, the respective amounts detected by the power supply monitoring unit 170 (see fig. 1) return to normal values. When detecting that the respective amounts return to the normal values, the power supply abnormality detection unit 180 (see fig. 1) transmits a signal indicating that there is no abnormality to the control unit 190.
When receiving the signal indicating no abnormality, the control unit 190 determines that the normal operation can be resumed, and resumes the display screen of the display unit 300 to the normal operation screen. For example, when receiving a signal indicating no abnormality, the control unit 190 cancels the warning display and displays a history indicating that an abnormality has occurred in the past in a predetermined area of the display unit 300. In this case, the control unit 190 may automatically restart the operation of the machine tool and/or the peripheral devices of the machine tool depending on the type of the cause of the abnormality, in addition to the cancellation of the warning display. For example, when the type of abnormality is a slight abnormality that does not require manual maintenance such as replacement of a component, the operation can be automatically restarted.
The structure of the present embodiment provides the following effects.
The control device 100 automatically selects each quantity related to the abnormality from each of the m quantities, thereby automatically diagnosing the cause of the abnormality. That is, when an abnormality occurs in the operation of the machine tool, the control device 100 automatically determines m kinds of values in the abnormality cause specification cycle, thereby specifying the cause of the abnormality. This eliminates the need for an operator to manually identify the cause of the abnormality, thereby improving maintainability.
In the present embodiment, the power supply monitoring unit 170 detects the respective amounts of the ac power supply 120 and the smoothing capacitor 150, but may detect the respective amounts of the voltage and/or the current of the peripheral devices of the machine tool including the speed and the acceleration of the motor 160.
Claims (4)
1. A control device for a machine tool, comprising:
a sensor that acquires a plurality of respective quantities representing states of voltage, current, and frequency of a power supply for operating the machine tool and/or a peripheral device of the machine tool;
an abnormality detection unit that detects an abnormality capable of estimating a plurality of causes with respect to an operating state of the machine tool and/or the peripheral device, and outputs a signal indicating the abnormality and respective sensor values at the time of detection of the abnormality; and
and a diagnosing unit that automatically selects each of the sensor quantities relating to the abnormality and automatically diagnoses causes of the abnormality estimated based on the selected quantities relating to the abnormality.
2. The control device of a machine tool according to claim 1,
further comprises a control part, a display part and a storage part,
the name of the abnormality, the cause of the abnormality, and the respective quantities relating to the abnormality are displayed on a display screen of the display unit, and the name of the abnormality, the cause of the abnormality, and the respective quantities relating to the abnormality are stored in the storage unit.
3. The control device of a machine tool according to claim 2,
the abnormality detection unit outputs a signal indicating absence of the abnormality to the control unit when it is determined that the cause of the abnormality is eliminated and normal operation is enabled,
the control unit returns the display screen to a normal operation screen, restarts the operation of the machine tool and/or peripheral equipment of the machine tool, and makes it possible to refer to the occurrence of the abnormality from the storage unit as a history and display the abnormality on the display screen.
4. The control device of a machine tool according to claim 2,
the abnormality detection unit outputs a signal indicating absence of the abnormality to the control unit when it is determined that the cause of the abnormality is eliminated and the abnormality can be recovered,
the control unit displays a history indicating that the abnormality has occurred on the display screen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-023047 | 2018-02-13 | ||
| JP2018023047A JP6744342B2 (en) | 2018-02-13 | 2018-02-13 | Machine tool controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110165969A CN110165969A (en) | 2019-08-23 |
| CN110165969B true CN110165969B (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910110243.3A Active CN110165969B (en) | 2018-02-13 | 2019-02-11 | Control device for machine tool |
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| Country | Link |
|---|---|
| US (1) | US10666184B2 (en) |
| JP (1) | JP6744342B2 (en) |
| CN (1) | CN110165969B (en) |
| DE (1) | DE102019000831A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7311319B2 (en) * | 2019-06-19 | 2023-07-19 | ファナック株式会社 | Time-series data display device |
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| JP2009163607A (en) * | 2008-01-09 | 2009-07-23 | Fanuc Ltd | Numerical control device having alarm cause display function |
| CN102717302A (en) * | 2011-03-28 | 2012-10-10 | 兄弟工业株式会社 | Machine tool |
| CN106181581A (en) * | 2015-05-29 | 2016-12-07 | 大隈株式会社 | The vibration information display device of lathe |
| CN107077124A (en) * | 2014-10-27 | 2017-08-18 | 株式会社牧野铣床制作所 | The control method of lathe and the control device of lathe |
| CN107340752A (en) * | 2016-04-28 | 2017-11-10 | 发那科株式会社 | The control device of lathe |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0664667B2 (en) | 1984-02-28 | 1994-08-22 | 株式会社アマダ | Alarm display device |
| JPH0388034A (en) | 1989-08-31 | 1991-04-12 | Brother Ind Ltd | Abnormality diagnostic device |
| JP5118167B2 (en) | 2010-03-24 | 2013-01-16 | ファナック株式会社 | Motor drive device for detecting power supply side abnormalities |
| JP5997603B2 (en) * | 2012-12-21 | 2016-09-28 | 川崎重工業株式会社 | Robot control apparatus and robot control method |
| JP6201160B2 (en) * | 2013-07-19 | 2017-09-27 | カルソニックカンセイ株式会社 | Power supply control device and relay abnormality detection method |
| KR101343403B1 (en) * | 2013-08-14 | 2013-12-20 | (주)한국툴모니터링 | Detecting method of abnormality of machine tool operation |
| JP6223935B2 (en) * | 2014-09-12 | 2017-11-01 | 株式会社神戸製鋼所 | Rotating machine abnormality detecting device and method, and rotating machine |
| JP6688962B2 (en) * | 2016-06-10 | 2020-04-28 | 富士通株式会社 | Judgment device, judgment method, and judgment program |
-
2018
- 2018-02-13 JP JP2018023047A patent/JP6744342B2/en active Active
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2019
- 2019-02-05 DE DE102019000831.6A patent/DE102019000831A1/en active Pending
- 2019-02-06 US US16/269,027 patent/US10666184B2/en active Active
- 2019-02-11 CN CN201910110243.3A patent/CN110165969B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009163607A (en) * | 2008-01-09 | 2009-07-23 | Fanuc Ltd | Numerical control device having alarm cause display function |
| CN102717302A (en) * | 2011-03-28 | 2012-10-10 | 兄弟工业株式会社 | Machine tool |
| CN107077124A (en) * | 2014-10-27 | 2017-08-18 | 株式会社牧野铣床制作所 | The control method of lathe and the control device of lathe |
| CN106181581A (en) * | 2015-05-29 | 2016-12-07 | 大隈株式会社 | The vibration information display device of lathe |
| CN107340752A (en) * | 2016-04-28 | 2017-11-10 | 发那科株式会社 | The control device of lathe |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019000831A1 (en) | 2019-08-14 |
| JP6744342B2 (en) | 2020-08-19 |
| US10666184B2 (en) | 2020-05-26 |
| JP2019139558A (en) | 2019-08-22 |
| US20190253018A1 (en) | 2019-08-15 |
| CN110165969A (en) | 2019-08-23 |
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